Semester 1 - Accuracy and Precision Notes

Accuracy - How close you are to the actual value OR how close the experimental value is to the true or real value for the quantity being measured

Your Results:

• Measured Results

• Experimental Results

Accepted Value:

• True Value

• Actual Value

• Known Value

• Reference Value

Precision - how well a measurement can be reproduced if the same is measured multiple times

• The smaller the difference between the repeated measurements the more precise or repeatable the measurement is

Basically:

Accuracy = Reliability

Precision = Repeatability

Percent Error calculation - How closely the measurement agrees with an accepted value of the same quantity

Measured Value: Value experimentally determined

Accepted Value: Most probable value of measurement

Percent Error Formula:

Credits: GeeksforGeeks

Experiments are accurate if percent error ranges from 10% of each other